The point people are making is that you are failing do recognise the different meanings of "backing" as in 1)underwriting and 2) being in favour of.
I referred to the underwriting of the Euro, and given the recent events in Cyprus have proven it is false. And if "being in favour of" is a form of backing, then in that case it needs to be clear from the get go in every conversation because I don't think that's how most people understand currencies to be "backed". "Being in favour of" is very, very different than how I define "backing" a currency.
As for "currency backing"....well now you're just moving the goalposts.
Fine. Call it "backing a currency". We're not just talking about any "backing", are we? If I put my back against the wall and call it "backing", should we discuss if bitcoin is being "backed" by anyone in such a way?